Blueprint apparatus and method



Jam 28, 1941- y F. H. cRoFooT Erm. 2,229,727

BLUEPRINT APPARATUS AND METHOD FiledApril 7, 19:58 4 sheets-sheet 1 Jan. 28, 1941. F. H. cRoFcoT Erm.

BLUEPRINT APPARATUS AND METHOD Filed April '7. 1938 4 Sheets-Sheet 2 MINNIE" Y 4 .o Z747 e f 17262)* iik/faq?.

Jan- 28 1941. F. H. cRoFooT ETAL 2,229,727

BLUEPRINT APPARATUS AND METHOD Filed April 7, 1 958 4 Sheets-Sheet 3 Jan' 28, 1941. F. H. cRoFooT ETAL BLUEPRINTIl APPARATUS AND METHOD Filed April 7, 1958 4 Sheets-Sheet 4 @aff/zinfa- Z M AZ @d MW @E Patented Jan. 1941 l' v i I. l

f-"UNITED STATE-Es vi'ii'rrsrrr" oI-Flclaz e l' messa-1 Frederick H. Crofoot, Chicago, and Edward. G. -Y

' Crofoot, Park Ridge, llle Application April 7. 1938, Serial No. 200,660

17 Claims. (Ci. 95415) 'I'his invention relates to improvements in bluetion. issulted' to practice the process of Kwech, print machines and processes. Patent No. 1,877,246.` This patentvcan be re- An object of the invention is to provide means ferred to for the detalls of practicing the procin a blueprint machine and steps in an improved ess, which details will not be repeated here, howprocess for applying an intensifying solution to ever, as' the 'apparatus is not limited toprac- 5 a print such as the intensifying solution taught ticing the process of said patent. in the patent to Kwech, No. 1,877,246. With .this Another-object has been to provide said mea object in mind, v we have provided a highly imin such a manner as will be inexpensive and easy proved blueprint machine and devised an imto assemble and apply vas attachments to standproved method for applying intensifying orl ard types of blucprintingv machines now on 10 other solution to the print after exposure and the market. before washing, the means including a coating As a result of' our invention, in accomplishroller and other features, as will be hereinafter ing the aforesaid objects. we have effected great vmore fully explained. improvements in respect of means and method l5 An object oi' the invention is to provide means for producing highly improved blueprints, and l5 for varying the period of travel of the blueprint; also in respect of effecting great savings of mapaper from one treatment to another so as to terials and liquids, and in other respects as will allow a chemical solution which has been applied be understood by those skilled in the art. to the paper to -remain on the paper a greater Other objects and advantages will appear more 2U or lesser length of time prior to the paper refully hereinafter. 20 ceivlng the next treatment so that the chem- IThe invention will be best understood by referical shall remain on the blueprint paper the ence to the accompanying drawings forming a time desired. part of this specification, and in which:

Another object of the invention is to provide Fig. 1 is an elevation of the feeding end of a.

means for adjusting the blueprint paper so as blueprint machine with means for adjusting the 25 to raise or lower the blueprint paper relative time of travel of the paper shown applied; to the coating roller so as to give the paper a Fig. 2 is a plan view of the left hand portion greater or lesser application of the coating and showninFig.1; i also so as to remove the paper from the coating Fig. 3 is a section taken on the line 3-3 of roller entirely in order to save the coating liquid Fig. 2; 30 when it is not necessary to apply the same to Fig. 4 is a detailed view of parts of the above the blueprint paper to eliminate waste of the mentioned adjusting means; liquld,whichisrelatively expensive. Fig. 5 is a section taken on the line 5-5 of Therefore. it has been found important to ap- Fig. 1;

ply only suflicient of the intensifying solution Fig. 6 is a plan view of the'removable trough 35 to perform the intensifying function while at and its rollers; and

Y the same time applying suihcient to give the Fig. 7 is a sectional elevation-of -the means l paper a greater or lesser application of the coatfor positioning the paper. the paper being shown ing and allow the intensifying solution which disengaged.

40 has been applied to the paper to remain on the Referring more particularly to the drawings in 40 paper a greater or lesser length of time prior which we have shown a form of our invention to receiving the next treatment, such as the rinsselected for illustrating the principles thereof, ing operation. Anyintensifying solution remainwe have shown our invention applied to a coning on the paper may be entirely rinsed from ventional blueprinting machine, the feeding end the surface of the carrier upon the succeeding of which ls shown in Fig. 1, particularly. 45

' water rinse. Thus, a further object of the in- Fed to a table l0 is a continuous sheet of bluevention resides in the provisionl of improved print paper Il which may be brought from a roll mechanism and an improved process employing conveniently positioned. The paper, with the cooperating elements or steps controlling lthe tracing to be copied. may be led around a semiamount of intensifying solution applied and the cylindrical glass support l2 by an endless belt I3 50 duration of the period d uring which the intenand may'be exposed to light from a well known sifying solution remains on the sheet. type of arc lamp Il. The belt carries the paper The machine illustrated in the drawings. which and the traclngs after exposure, and the tracings we have selected as a preferred form for the may be dropped on a receiving table I5. The

purpose of illustrating the principle of our invenexposed blueprint paper then travels on the end- 55 less belt about a roller I6 suitably mounted on a shaft I1 in a vframe I8. 'I'he paper and the belt, as clearly shown in Fig. 1, run around an idle roller I9 where the paper and belt separate, the belt returning over the roller indicated at and returning over the glass support back to the roller I6 making a continuous cycle of operation. The belt constitutes the feeding means in a well known manner and may be driven by the shaft I1 from a suitable source of power.

The blueprint -paper may then be carried around an idle roller 2| which is adjustably mounted on a pair of sprockets and chains, such as shown, supported in turn on metal angle irons 22 in the frame of the machine.

It will be understood that the roller 2I may be adjusted by moving the chain in a suitable manner to position the roller to take up the slack of the blueprint paper and keep the blueprint paper turning properly as will be well known to those skilled in the art. The foregoing are all parts of the conventional blueprint machine and are not claimed as our Invention.

In accordance with the lprinciples of our invention we have attached to a well known type of blueprinting machine a pair of supporting frames 23, each of which has a forward vertical leg 24, a central vertical leg 25 and a rear vertical leg 26, one of the frames 23 being clearly shown in Figs. 1 and 3. The frames also have a top rail 21, and an intermediate rail 28 with transverse connecting bars 29 for uniting the supporting frames 23. The frames 23 are supported on the supplemental angle irons 22 as clearly lshown in Fig. 1.

The blueprint paper may be led from the idle roller 2| to a positioning roller 30 in a suitable manner mounted on a shaft 3l in bearings 32 secured on the central vertical legs 25. The blueprint `paper may then be'- led over a coating roller 33 for the lpurpose of supplying an intensifying, or other such solution to the blueprint paper.

The coating roller 33 may be mounted on a 45 shaft 34 having suitable bearings 35, the shaft being mounted on the intermediate rail 28 in the form shown. The shaft 34 may be operated by a driven pulley 36 driven by a belt 31 from a driving pulley 38 mounted on the shaft I1 and 50 the frame is. The shaft may be provided with y conventional collars 39.

The' coating roller 33 may be supplied with coating from a semicylindrical trough 49 having ends 4I. "55- In the form which we have shown, the trough ,is provided with means for rendering it easily `removable. The trough 40 may have four keepers, 42, las shown, each with a slot 43 Adapted to extend through each slot 43 is a pin 44 on a latch 60 bolt 45.: r'Ihe fo-ur latch bolts 45 are adapted to rest in use on the outside of four guide blocks 46, `on Ashelves 41 integrally formed with the lower intermediate rails 26 at the front or receiving end of the frame 23. It will ibe seen from the foregoing that in normal use when it is desired to place the trough in place the pins may be grasped and moved in the slots toward the ends of the trough, in which case the bolts 45 will be projected on to the shelves outside the guide blocks on the shelves in which event the trough will be securely held in place. When it is desired to remove the trough all that is necessary is to grasp the pins 44 and push them inwardly and the bolts will be withdrawn from 75 the shelves and the trough can be easily removed.v

The trough 40 may be provided with a exible supply pipe 48 connecting with an operating source of supply or fountain 49 supported by a post 50 secured to one of the forward vertical legs 24. 'I'he trough 40 will also be provided with a drain pipe 5I having a suitable `valve or drain cock 52. The parts just described are clearly shown in Figs. 1, 3, 5 and 6.

After the blueprint paper has been coated by the roller 33 it may be led around an adjustable roller 53 on a shaft 54 with a pair of bearings 55 mounted on a pair of pivoted arms 56 which are pivoted on their other ends on the shaft 3|, being provided with collars 51.

A pair of eyelet bolts 56 are pivotally connected to the shaft 54, there being provided suitable collars 59, and the bolts 58 extend through brackets 60 mounted on the inside of the top rails 21 through slots 6I in the brackets 60. The eyelet bolts have threads 62 and are adapted to be adjusted upwardly or downwardly by wing nuts 63, each bolt 58 being provided with a stop lug 64, clearly shown in Figsf 3 and? to pass through a slot 6I when the roller carried by the bolt and arm is raised to lift the paper off of or out of contact with the coating roller and rest on the top ofthe bracket to hold the parts in this position. A timing roller 65 is mounted on shaft 66, in a pair of adjustable sliding blocks 61. The blocks are adapted to slide in slots 68 in inclined brackets 69 mounted on top rails 21.

It will be understood that the shaft 66 turns within the blocks 61 and the blocks which slide in the brackets 69 are provided with collars 1I! on the outside of 'the brackets for maintaining the blocks in the brackets, as clearly shown in Fig. 5. Each block 61 has a T-'shaped recess 1I in which is mounted in a swiveling manner, a bolt 12 with threads 13. Each bolt 12 extends through the threaded bore 14 in each bracket 69 and each bolt 12 is provided with a handle 15 which moves the corresponding block to a desired position and thereby moves the roller 65 to a desired position. Each inclined bracket 69 is provided along one edge with a scale 16 and each block 61 has a pointer 11 which moves along the scale or calibrations 16 as does the print after passingover the roller 65 to facilitate adjustment.

In the foregoing we have described means whereby the blueprint paper may be lowered or pressed down further, if desired, on the coating roller 33, or it may be lifted up so as to press with relative lightness on the coating roller 33, or if desired, the blueprint paper may be lifted off the coating roller 33 entirely, asillustrated in Fig. '7. By this means the paper can be givenv as much or as little coating as desired, by increasing or decreasing the surface contact and thus the area contacted or engaged as to the paper with respect to the coating roller 33 and the pressure therebetween. This arrangement is highly advantageous, especially in that if there is no need for coating the blueprint paper the blueprint paper may be lifted off the coating roller 33 and the coating liquid will be saved and not wasted. It will be understood that this adjustment with the position of the blueprint paper in respect to the coating roller 33 may be accomplished simply by adjusting the wing nuts 63 on the bolts 58. By corresponding adjustment of the rollers 65, the duration of time in which the treatment, coating or intensifying solution is allowed to remain on the print before being subjected to the next treatment may be properly regulated or kept the same, shortened or lengthened, vso that the proper time required will be. allowed.

We have also described the means whereby paper canbe given a coating by the roller 88 and whereby that coating may be allowed to remain for as little or as long a time relatively as may be required before it is subjected to the next succeeding treatment. For example, it may be desirable to have the coating given by roller 88 remain on the blueprint paper for a longer or shorter time before the paper is subjected to the water treatment, as shown in Fig. 3. These adjustments just described mark a distinct step in the art which will be appreciated by those familiar with the art. It will also be understood that the adjustment just described for controlling the time for leaving the treatment or intensifying coating solution on the blueprint paper-may be effected merely by operating the handles 15. If the handles are operated in one direction the roller 65 will be moved upwardly increasing the period of time of travel which the blueprint paper must take before reaching the next treatment. On the other hand if the handles 15 are operated in the opposite direction the roller 65 will be moved downwardly, decreasing the period of time the blueprint paper must travel before reaching the next treatment and thereby decreasing the amount of time in which the coating will be allowed to remain on the blueprint paper before being subjected to the next treatment.

After passing over the roller 65 the paper may be carried around an idle roller 18 superimposed.

over a drain trough 18 and the blueprint paper may then be carried around another additional roller 80. Pipe 8l extends transversely of the machine with a row of apertures across its entire length and water may be sprayed from this water spray pipe 8| between the rollers 88 and 18, as clearly vshown in Fig. 3. Preferably, a suicient amount of water is sprayed'upon the paper or carrier to remove completely the intensifying solution.

The water may be forwarded to the water spray pipe `8| from a suitable source of supply.

After being led around the roller 88 the blueprint paper may be led to a positioning roller 82 corresponding to roller 38 suitably mounted on a shaft 82a journaled in bearings similar to bearings 82 but mounted on the rear vertical legs 26, the' roller 82 serving substantially the same function as the roller 30. The blueprint paper may then be led over a potash roller 83 or -other suitable roller suitably mounted on a shaft 84 suitably mounted on the upper rear intermediate rails 28 and operated by a driven pulley 85 driven by a belt 86 from a driving pulley 81 ixedA on the shaft 84. The potash coating roller 83 functions in substantially the same manner as the coating roller '88 to supply the paper with the potash liquid. A'trough similar to the trough 48 is provided in conjunction with the potash roller 88 and is provided with similar means of removability. The trough for the roller 83, as

is the roller 88, is provided with a source of potash supply 88 carried through a supply tube 48', and the trough has a drain similar to the drain pipe 6I.

There is also provided means for pressing the blueprint paper more or less lightly on the roller 88, or lifting the blueprint paper oi, as is the case with the roller 38, and the means employed are substantially the same. there being an adjustable roller 88 having means of adjustment `similar to that of roller 68, excepting that the bolts are slightly shorter than the bolts 88.

Roller 88 is mounted on a shaft having bearings on arms 8|, and armsll are pivoted on shaft 82 instead of the shaft of the roller 82 corresponding to the roller 88 in a manner similar to the mounting'of the arms 58 heretofore described with respect to the shaft 8| and the shaft 54.v

The shaft 82 has a pair of bearings 88 mounted on the rear vertical legs 26. The paper may be led around the roller 88 to a discharge roller 84 from which it may be led to the washing and drying sections of the conventional blueprint machine.

In the practical operation of the machine with our invention applied we have found it satisfactory to operate the shaft 84 two times as fast as the shaft 34, or four times as fast as the shaft I1, with the shaft 34 operating two timesas fast as the shaft il. As shown in Fig. 1, shafts 84 and 84 rotate counter-clockwise whereby the peripheral travel of the rollers is opposite that of the paper, but should the speed of the machine be so reduced that this driving action would result in the application of too great an amount of intensifying solution or oxidizing solution, this may be corrected by proper adjustof belt 31 to reversegthe drive.

It will be understood by those skilled in the art that blueprint paper or other photo-sensitized carrier is. customarily prepared by coating a suitable type of paper with a ferric salt such as ferric ammonium citrate or oxalate, which will be reduced by the action of light to the ferrous state. With the ferrie salt is admixed a second compound which combines with the reduced iron compound to form a highly colored image." It is customary to employ potassium ferricyanide.

-ment, such as by twisting or crossing the laps A diagram, the reproduction of which is desired, may be interposed over the coated paper and then exposed to the action of actinic light for a period of time sufficient to insure reduction line, for example, having a p'H` of 8 orfmore.'v

Sodium carbonate or other alkaline compound may be employed to impart the desired alkalinity. With the potassium ferrocyanide bath may be combined a stronger reducing agent or inhibitor n Y such as sodium Ahyposulfite, sodium sulite, or potassium meta bisulte. The 4amount of inhibitor will depend upon the length ottime between the intensifying bath and the voxidizing bath to which the paper is later subjected.

subsequent to Athe intensifying bath, the paper' is subjected t6 a water bath bath.

and an oxidizing* y 'f 70]l ,A To illustrate, a photosensitive base is prepared by coating paper, cloth Vor some similar carrier with a I'Gpercent solution of ferrie ammoniumcitrate, a 16 percent solution of vpotassiun'i ferricyanide, and a 5 percent solutionvoioxalic acid.

The paper prepared in this manner is exposed beneath the desired diagram to light.

After exposure the paper is subjected to an intensifying solution composed of an 18 percent solution of potassium ferrocyanide to which is added 1 percent sodium carbonate and approximately 3 percent sodium sulilte.

The intensified paper is then washed with water, and immersed in a 'I percent solution of potassium dichromate.

Following the oxidizing bath, the paper is again washed with Water, and dried.

The above is given as an instance of the use of the apparatus described and it will be understood that the apparatus is not limited however to the use of such a process.

While we have illustrated and described the preferred form of construction for carrying our invention into effect, this is capable of variation and modification without departing from the spirit of the invention. We, therefore, d not wish to be limited to the precise details of construction set forth, but desire to avail ourselves of such variations and modifications as come within the scope of the appended claims.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In a print machine, means for adjusting the travel of the print paper, said means including a positioning roller around which the paper is adapted to be drawn over a coating roller for applying an intensifying solution thereto, a coating roller over which the paper is adapted to be drawn from the positioning roller, said position- .ing roller being located at one side of and below Tr'the coating roller, a second roller at the other side of and above the coating roller around which the paper is adapted to be drawn after it has left the coating roller, an adjustable roller spaced a considerable distance above the aforesaid rollers and over which the paper travels after leaving the second roller adapted to be moved relative the other rollers to vary the time of travel of the coated paper prior to the next succeedingl treatment of the paper, said adjustable roller being mounted in a pair of slidable blocks having a pointer, brackets in which said blocks are slidably mounted having an inclined calibrated edge with which the pointer cooperates and along which the paper travels and means for adjusting said blocks and adjustable roller relative said brackets.- p

2. In a machine of the character described, mechanism for subjecting sensitized material to the action of light, mechanism for applying an intensifying solution to the surface of said material, mechanism for rinsing the surface of said vmaterial, and means for regulating the distance of travel of said material between said intensifying solution applying mechanism and said rinsing mechanism.

3. In a machine of the character described, mechanism for subjecting sensitized material to the action of light, mechanism for applying an intensifying solution to the surface of said material faster than the movement of the material when' subjected to the action of light, mechanism for subsequently rinsing the surface of said material, means for vregulating the distance of travel of said material between said intensifying solution applying mechanism and said rinsing mechanism, and means for applying an oxidizing solution to the surface of said material faster apply a variable amount of solution depending upon the pressure and area of surface contact of said material with the applying mechanism.

5. In a machine of the character described, mechanism for subjecting sensitized material to the action of light, mechanism for applying an intensifying solution to the surface of said material twice as fast as the movement of the material when subjected to the action of light, mechanism for rinsing the surface of said material, means for regulating the distance of travel of said material between said intensifying solution applying mechanism and said rinsing mechanism, and means for applying an oxidizing solution to the surface of said material twice as fast as the movement of the material when applying the intensifying solution, said intensifying solution applying mechanism constructed and arranged to apply a predetermined amount of solution depending upon the pressure and/or surface contact of said last named mechanism with said material.

6. In a machine of the character described, mechanism for subjecting sensitized material to the action of light, mechanism for applying an intensifying solution to the surface of said material, mechanism for rinsing the surface of said material, means for regulating the distance of travel of said material between said intensifying solution applying mechanism and said rinsing mechanism, said intensifying solution applying mechanism constructed and arranged to apply a predetermined amount of solution depending upon the period of travel, area and surface contact of said material, and means auxiliary to the mechanism for applying an intensifying solution for controlling the eective amount of surface and pressure of said material subjected to said intensifying solution applying mechanism during the application thereof and pressure against same.

7. vIn a machine of the character described, mechanism for applying an intensifying solution to the surface of a sheet of traveling material, mechanism for rinsing the surface of said ma.- terial, said intensifying solution applying mechanism constructed and arranged to apply a predetermined amount of said solution whereby said solution will remain on the sheet for a greater or lesser length of time prior to reaching said rinsing mechanism, and means for regulating the distance and time of travel of said material between said solution applying mechanism and said rinsing mechanism.

8. The process herein described comprising subjecting a traveling sheet of sensitized material to the action of light, applying a predetermined amount of intensifying solution to the Vsurface of said material, rinsing the surface of said material, and regulating the period and distance of travel of said material between said intensifying solution applying operation and said rinsing operation whereby said intensifying solution will remain on the paper 'a greater or lesser length of'time prior to reaching said rinsing operation.

9. The process herein described comprising subjecting a traveling sheet of sensitized materialv to the action of light, applying a predetermined amount of intensifying solution to the surface of said material while said material is in a dry state, subsequently rinsing the surface of said material, regulating the period and distance of travel of said material between said intensifying solution applying operation and said rinsing operation whereby said intensifying solution will remain on the paper a greater or lesser length of time prior to reaching said rinsing operation, and thereafter applying an oxidizing solution. to the surface of said material.

l0. In a print machine, means for making a print of a tracing, said means including mechanism for exposing the print to the action of light modied`by a design, mechanism for applying an intensifying solution to the print after said exposure, said means including a coating roller, and means for adjusting the travel of the print during and subsequent to applying said solution and prior to rinsing or other treatment, said means including rollers around which the paper is drawn, and mechanism for varying the relative4 positions and spacing of said rollers to increase or decrease the period of travel of the print,`in cluding an adjustable roller, a bracket in which said roller is slidable and means to slide said roller and hold the same in adjusted position.

11. In a print machine, means for making a print of a, tracing, said means including mechanism for exposing the print to the action of light modified by a design, mechanism' for applying an intensifying solution to the print after said exposure, said means including a coating roller, means for rinsing said print, means fer applying an oxidizing solution to the p'rint after rinsing, and means for adjusting the travel of the print after coating and before rinsing, said means including rollers around which the paper is drawn, and mechanism for varying the relation of said rollers to increase or decrease the period of travel of the print, including an adjustable roller, an inclined bracket mounted in iixedfposition and having an inclined edge, the print traveling along said edge, a slidable bearing carried by the bracket and supporting the roller and means for adjusting the bearing and' roller toward and away from the aforesaid rollers and holding the same in adjusted position.

12. In a print machine, means for making a print of aftracing, said means including mechanisml for exposing the print to the action of light modified by a design, mechanism for applying..an'intensifying solution to the print after said exposure, said means `including a coating roller, means for subsequently treating the print, and means for adjusting the travel of the print prior` to said subsequent treatment, 'said means including rollers around which the paper is drawn, and mechanism for varying the relation of said rollers to increase or decrease the period 'of travel of the print, including an adjustable roller, brackets mounted in iixed position, slidable bearings carried by the brackets and supporting the roller, at least one of said bearings having a pointer and a scale on at least one of the brackets along which the print travels and with which the pointer cooperates.

13. In a blueprint apparatus a frame, brackets on the frame, a roller supported for adjustment on the frame, a roller adjustably supported to be raised or lowered longitudinally of the brackets, means for exposing the print to the action of light modied by a design, a plurality of coating rollers, troughs for each of said rollers, means for maintaining the level of the coating liquid in said troughs and into which the rollers dip, positioning rollers around which the print travels in commotion with the aforesaid rollers and positioned on one side of the coating rollers, and swingably supported rollers on the other sides of the coating rollers and above the same beneath which the print travels, said swingably supported rollers being adapted to be held in adjusted relation to the coating rollers to vary the area of contact and pressure with the coating rollers by the print or to be held out of contact v therewith.

15. In a blueprint apparatus a frame, brackets on the frame, a roller adjustably supported longitudinally of the brackets, means for exposing the print to the actionof light modified by a design, a plurality of coating rollers, troughs for each of said rollers, means for maintaining the level of the coating liquid in said troughs and into which the rollers dip at a xed point, positioning rollers around which the print travels in commotion with the aforesaid rollers and positioned on one side of the coating rollers, arms pivotally mounted, rollers carried by the arms, adjustable connections between the arms and the frame to move the print passing between the positioning rollers and the rollers carried by the arms into or out of contact with the coating rollers and to vary the surface contact therewith, said print passing over the adjustable roller whereby adjustment of the latter will vary the time between the periods of contact of the print with a coating roller and subsequent treatment thereof, and a discharge roller at the end of one arm. 1

16. In a print machine, means for adjusting the position of the print paper relative to a coating roller, said means including a positioning roller around which the paper is adapted to be drawn, said -positioning roller being nxedly located on one side of the coating roller and an adjustable roller movably supported and posivtioned on the other side of the coating roller around which the paper is adapted to be drawn after it leaves the coating roller, said adjustable roller being adapted to be lowered or raised relative to the coating roller to vary the degree of pressure and area of contact between the paper and the coating roller, another adjustable roller over which the paper is trained after passing around the vaforesaid. adjustable roller and means for rinsing the paper, said second mentioned adjustable roller serving to vary the distance and time of travel of the paper between the coating and the rinsing operations.

17. In a machine of the character described, mechanism for subjecting sensitized material to the action of light, mechanism lfor applying an intensifying solution to the surface of said maarea of contact and increasing or decreasing the terial, mechanism for rinsing the surface of said pressure between the material and the intensimaterial, meansv for regulating the distance of iying solution applying mechanism. travel of said material between said intensify- 5 ing solution applying mechanism and said rns- FREDERICK H. CROFOOT. 5

ing mechanism and means for regulating the EDWARD G. CROFOOT. 

